Mount for fuses in fuse boxes



Feb. 17. 1925.

' 1,527,049 H. P. LlVERSlDGE MOUNT FOR FUSES IN FUSE BOXES Filed Sept. 26, 1918 also Feb. 11, 1925.

PATENT OFFICE.

HORACE P. LIVERSDGE, OI BALL, PENNSYLVANIA.

mourn ron rUsEs IN roan BOXES.

Application filed September 28, 1918.

To all whom it may concern:

Be it known that I, HORACE P. LIVER- srnon, a citizen of the United States, residing at 127 Birch Avenue, Bala, in the county of Montgomery and State of-Pennsylvania, have invented certain new and useful Mounts for Fuses in Fuse Boxes, of which the followin is a specification.

My invention relates to the mounting of enclosed fuses in fuse boxes. The main purpose of my invention is to mount an enclosed electric fuse within the box in a swingin carrier or frame by which its contacts may placed in position within contact clips and withdrawn therefrom.

A further purpose is to rigidly mount an enclosed fuse upon insulation supporting it at opposite ends, so that the fuse may be placed and withdrawn by the supports.

A further purpose is to nude a carrier or frame swingmg towar and from fuse contacts and to mount an enclosed fuse firmly upon the frame by the metal parts of the fuse but without interference with the functioning of the fuse contacts and preferably by the use of separate insulators carried by the frame.

A' further purpose is to mount a fuse rigidly by means of metal contact fuse ends upon a frame movable to and from the normal fuse contacts of the switch box and to provide for selective withdrawal of said frame and fuse by means of a door of the box.

A further purpose is to mount the metal terminals of a fuse and the clips with which the enga e upon separate insulators prefera ly of t e disk type having a large creeping insulating surface.

Further pur oses will appear in the specification an in the claims.

I have preferred to illustrate my inven tion by but one form thereof, selecting a form which is in use has proved to be practical, efficient and'thoroughly reliable and which at the same time well illustrates the principles of my invention.

Fig. l is a front elevation of a fuse box embodying a preferred form of my inven-. tion,

Serial No. 255,772.

Fig. 2 is a front elevation of the structure of Fig. 1 with the door open.

Fig. 3 is a perspective view of the construction of Fig. 1 with the door and fusecarrying frames both open but separated for better clearness of illustration.

Flg. 4 is a broken vertical central section of Fig; 3.

In t e drawings similar numerals indicate like parts.

The problems of fuse box construction, and fuse inspection and replacement have been complicated by the necessity for in sulation and for protection from the weather and from mechanical injury.

With an open fuse, inspection has been simpllfied and means for carrying the fuse along with special contacts for it has been available, as, for example, in U. S. patent to Sargent, Number 842,987, issued February 6, 1907. However, the support of an enclosed fuse in a fuse box so that its own contacts can be used as the contacts of a knife switch blade is believed by me to be new, as well as the construction for mounting it and facilitating its inspection and replacement.

The fuse box 5 is provided with inlet and outlet insulated openings at 6 and 7 for conductors to be secured to switch ter-' minal clips 8 and 9. These clips are mounted upon insulation which, in its best form comprises separate stepped disk insulators 10 and 11. prefer the separate insulators to a single bar or slab of insulation because of the higher insulation thus available.

A skeleton door frame 12 is pivoted in the front of the box and carries insulation rately here claimed. It comprises a tubular insulated body 16 having square electrically-conducting contacts 1 and 18 effective as ferrules to which the fuse wire or strip 19 is connected through a plug 20. at one end and a strip 21 at the other end.

In order to prevent turning of the fuse the mount for one end is in the form of a flat hook or prong 22 which can be inserted within a fiat eye 23 when the upper fuse end is slightly tilted toward the upper part of the'back of the box from the position shown in Fig. 4.

The opposite, here upper, end is provided with a pin 24: which latches into an opening 25 in a spring arm 26 mounted upon the insulator 13. As will be seen the movement of the skeleton door frame will cause the enclosed fuse to act as a knife switch and the contact blocks 17 and 18 will be inserted within the contact clips 8 and 9 or withdrawn therefrom. The fuse contacts function with the clips in the same manner as they would if the fuse were inserted and withdrawn by hand. The skeleton door acts merely as a carrier in that it does not form any part of the electrical circuit.

This is highly advantageous as each new connection added means another possible source of contact trouble. The carrier frame is pivoted upon an axis 27 and is arranged to open preferably a part only of the way, as best seen in Figs. 3 and 4. It is controlled by a cover 28 pivoted about the same axis and opened and closed by means of a handle 29. Movement of the handle in one-direction causes retraction of the bolt at 30 from its hold within the box at 31. By this means the door can be opened without affecting the position of the carrier frame 12 and fuse carried upon it. Of course, if this be not desired, the fuse can be carried by the door itself. As the frame is a skeleton frame the fuse can be inspected without withdrawal, though from the front only. If further inspection be desired or it be the intention to replace the fuse, the handle 29 is turned further to cause the opposite end of the bolt to project through opening 32 and to engage the carrier frame at 33 so that the frame may be withdrawn along with the door.

The frame and door are normally to be carried together at all times when the frame is opened but could be disconnected and then moved separately by reverse turning of the handle 29. They have been shown as disconnected in Figures 3 and 4; for purposes of illustration.

In replacing the frame the outer door is merely closed, closing the frame and seating the fuse within the clips.

It will be evident that various forms of I my invention will occur to the designer, se-

curing in differing ways all or some part of the advantage of my invention yet coming within the fairinterpretation of my claims in view of the disclosure herein.

It will be evident that the o eration will be the same with fuses of roun contact section as with the square, but that the rigid mounting for the round fuses need not prevent turning of the fuses.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: V

1. In a fuse box and fuse construction, a box, fixed insulatorswithin the box, contact clips carried by the insulators, a frame movable toward and from the clips, insulators carried by the frame, a tubular fuse-enclosing fuse holder having operating contacts at intermediate positions, adapated when the frame is closed to engage with the clips, supports for the ends of the fuse holder mounted uponthe insulators and extending, the one forming apivot for the fuse holder and the other alatch to hold it in position and a closure from the box separate from the frame and adapted to engage or dis-' engage the frame for movement thereof or movement separate therefrom.

2. In a fuse box and fuse construction, a box, contacts therein insulated from the box, an enclosing fuse holder having co-operating contacts upon its surface and a carrier engaging the ends of the fuse holder separately for placing and withdrawing it into and out of the contacts.

3. In a fuse boxand fuse, a fuse box, in-

sulated contacts therein, a carrier mounted to swing toward and from the front of the box, insulation upon the carrier, rigid mounting for an enclosed fuse and holder carried by the insulation and preventing the turning of the fuse holder, and a fuse holder having contacts upon its surface and supported by the carrier free from interference with its contacts to engage the box contacts when the carrier is swung to position.

4. In a fuse box and fuse construction, a fuse box, contacts therein insulated from the box, a fuse-enclosing fuse holder having exterior contacts co-operating with the box contacts, a swinging carrier for the fuse holder, insulation thereon, and supports for the fuse holder carried b the insulation of which one engages an en of the fuse holder beyond the fuse holder contact.

5. In a fuse box and fuse construction, a

box body, insulation therein, clips mounted the fuse holder.

7. In a fuse box and fuse construction, a box body, contact clips therein, a frame movable toward and from the clips, mounting connect-ions comprising one member of a longitudinally insertable fastening at one end and one memberof a snap fastener at the other and a fuse holder carrying the cooperating fastener members for rigid connection with the frame and having'external c0ntacts for engagement with the clips.

8. In a fuse box and fuse construction, a box, contact clips carried therein and insulated therefrom, a fuse-enclosing fuse holder having external contacts adapted to co-operate with the contact clips, a carrier for the fuse holder, insulation on the carrier and mounting for the fuse holder upon the insulation comprising hook and eye connection at the one end and spring-engaging connection at the other end thereof.

9. In a fuse box and fuse construction, a box, contact clips carried therein and insulated therefrom, a fuse-enclosing fuse holder having xternal contacts adapted to co-operate with the contact clips, a carrier for the fuse holder, insulation on the carrier and mounting for the fuse holder upon the insulation, comprising hook and eye connection at the one end and spring-engaging connection at the other end thereof, and a door closing the front of the box and protecting the fuse holder and carrier.

10. In a fuse box and fuse construction, a box, contact clips therein, insulation for the contact clips, a fuse-enclosing fuse holder having contact faces adapted to engage the clips, a carrier engaging the fuse holder and adapted to place and withdraw the fuse holder in position, having a skeleton construction for inspection in closed position, and a door adapted for selective openin or opening along with the carrier at the wi of the operator.

11. In a fuse box and fuse construction, a box body, clips for the fuse, a fuse-enclosing fuse holder adapted to engage with the clips and having contact terminals to co-act therewith, askeleton frame movable with respect to the body for the placing and removal of the fuse. holder and firm connecting and insulating means between the skeleton frame and the fuse holder, permitting inspection of the fuse in place and removal thereof by movement of the frame.

12. In a fuse box and fuse construction, a box, separate insulators therein of disc type, contact clips supported one on each disc insulator, a fuse-enclosing fuse holder having contacts adapted to engage with the contact clips, a carrier for thefuse holder adapted to swing toward and from the clips perpendicular to the fuse holder, insulation upon the carrier and supports for the fuse holder at the ends thereof secured to the insulation.

13. In a fuse box and fuse construction, a box body, discinsulators therein, fuse clips supported on the insulators, a'fuse-enc-losing fuse holder adapted to co-act with the clips, rigid disc insulator support for the fuse holder at opposite ends and an open pivoted frame carrylng the fuse holder as the knife of a switch in placing and removing it with respect to the clips.

14. In a fuse box and fuse construction, a box body, disc insulators therein, fuse clips supported on the insulators, a tubular fuse holder adapted to co-act with the clips, rigid disc insulator support for the, fuse at opposite ends and an open pivoted frame carrying the fuse holder as the knife of a switch in placing and removing it with respect to the clips and havin skeleton formation, permitting examination of the fuse when the latter is in position.

HORACE P. LIVERSIDGE. 

